Impact of BMI on perioperative outcomes following total thyroidectomy: a systematic review and meta-analysis

Figures

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  Fig. 1. PRISMA diagram of study identification and selection for meta-analysis

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  Fig. 2. Graphical summary of risk of bias in the included studies based on ROBINS-I tool

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  Fig. 3. (A) Forest plot comparing the postoperative recurrent laryngeal nerve palsy in two BMI groups of BMI < 25 kg/m2 and ≥ 25 kg/m2. (B) Forest plot comparing the transient recurrent laryngeal nerve palsy in two BMI groups of BMI < 25 kg/m2 and ≥ 25 kg/m2. (C) Forest plot comparing the permanent recurrent laryngeal nerve palsy in two BMI groups of BMI < 25 kg/m2 and ≥ 25 kg/m2. (D) Forest plot comparing the postoperative recurrent laryngeal nerve palsy in two BMI groups of BMI < 30 kg/m2 and ≥ 30 kg/m2. (E) Forest plot comparing the transient recurrent laryngeal nerve palsy in two BMI groups of BMI < 30 kg/m2 and ≥ 30 kg/m2. (F) Forest plot comparing the permanent recurrent laryngeal nerve palsy in two BMI groups of BMI < 30 kg/m2 and ≥ 30 kg/m2. (G) Leave-one-out sensitivity analysis: Forest plot comparing permanent recurrent laryngeal nerve (RLN) palsy between patients with BMI < 30 kg/m2 and ≥ 30 kg/m2

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  Fig. 4. (A) Forest plot comparing the postoperative hypoparathyroidism in two BMI groups of BMI < 25 kg/m2 and ≥ 25 kg/m2. (B) Forest plot comparing the transient hypoparathyroidism in two BMI groups of BMI < 25 kg/m2 and ≥ 25 kg/m2. (C) Forest plot comparing the permanent hypoparathyroidism in two BMI groups of BMI < 25 kg/m2 and ≥ 25 kg/m2. (D) Forest plot comparing the postoperative hypoparathyroidism in two BMI groups of BMI < 30 kg/m2 and ≥ 30 kg/m2. (E) Forest plot comparing the transient hypoparathyroidism in two BMI groups of BMI < 30 kg/m2 and ≥ 30 kg/m2. (F) Forest plot comparing the permanent hypoparathyroidism in two BMI groups of BMI < 30 kg/m2 and ≥ 30 kg/m2

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  Fig. 5. (A) Forest plot comparing operative time between patients with BMI < 25 kg/m2 and ≥ 25 kg/m2. (B) Leave-one-out sensitivity analysis: Forest plot comparing operative time between patients with BMI < 25 and ≥ 25. (C) Forest plot comparing operative time between patients with BMI < 30 kg/m2 and ≥ 30 kg/m2. (D) Leave-one-out sensitivity analysis: Forest plot comparing operative time between patients with BMI < 30 kg/m2 and ≥ 30 kg/m2. (E) Forest plot comparing postoperative bleeding between patients with BMI < 25 kg/m2 and ≥ 25 kg/m2 (F) Forest plot comparing postoperative bleeding between patients with BMI < 30 kg/m2 and ≥ 30 kg/m2